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Decrease in frequency of the r+ allele due to conversion. Mr = 10−8, Mab = 0, no viability selection on a, b, or r. □, C = 0.2; ▪, C = 0.1; ▵, C = 0.05; ▴, C = 0.02. (A) Conversion not opposed by selection (X = 0). The inset is an enlargement of the first 100 generations, with the dotted line showing the effect of mutation alone. (B) Conversion opposed by fertility selection (X = 0.5). With C = 0.02 the frequency of the r+ allele had decreased to 0.01 at generation 1813.
